... ,stainless steel stair treads, trench grating standard steel gratinggalvanized steel floor grating galvanized steel gratingsMaterial ... covers etc. We can design and manufacture standard steel grating and in customized shapes per ... x 3, 32 x 5 x 3, 38 x 5 x 3, 40 x 5 x 3, 50 x 5 x 3, 50 x 7 x 4, 55 x 7 x 4, 60 x ... and 30, 40, 60mm are recommended, America standard is available.3) Cross Bar Pitch (center ...